US7126436B1 - Frequency synthesizer having a more versatile and efficient fractional-N control circuit and method - Google Patents
Frequency synthesizer having a more versatile and efficient fractional-N control circuit and method Download PDFInfo
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- US7126436B1 US7126436B1 US10/947,519 US94751904A US7126436B1 US 7126436 B1 US7126436 B1 US 7126436B1 US 94751904 A US94751904 A US 94751904A US 7126436 B1 US7126436 B1 US 7126436B1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/60—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers
- G06F7/68—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers using pulse rate multipliers or dividers pulse rate multipliers or dividers per se
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
- H03L7/197—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
- H03L7/1974—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division for fractional frequency division
- H03L7/1976—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division for fractional frequency division using a phase accumulator for controlling the counter or frequency divider
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Priority Applications (1)
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US10/947,519 US7126436B1 (en) | 2003-09-25 | 2004-09-22 | Frequency synthesizer having a more versatile and efficient fractional-N control circuit and method |
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US50581203P | 2003-09-25 | 2003-09-25 | |
US50623203P | 2003-09-26 | 2003-09-26 | |
US10/947,519 US7126436B1 (en) | 2003-09-25 | 2004-09-22 | Frequency synthesizer having a more versatile and efficient fractional-N control circuit and method |
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US7126436B1 true US7126436B1 (en) | 2006-10-24 |
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US10/947,519 Active US7126436B1 (en) | 2003-09-25 | 2004-09-22 | Frequency synthesizer having a more versatile and efficient fractional-N control circuit and method |
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Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070001776A1 (en) * | 2005-06-30 | 2007-01-04 | Shuliang Li | Frequency modulator, circuit, and method that uses multiple vector accumulation to achieve fractional-N frequency synthesis |
US20090121758A1 (en) * | 2007-11-14 | 2009-05-14 | Via Technologies, Inc. | Chipsets and clock generation methods thereof |
US7701297B1 (en) | 2005-06-30 | 2010-04-20 | Cypress Semiconductor Corporation | Spread spectrum frequency synthesizer with improved frequency shape by adjusting the length of a standard curve used for spread spectrum modulation |
US7741918B1 (en) | 2005-06-30 | 2010-06-22 | Cypress Semiconductor Corporation | System and method for an enhanced noise shaping for spread spectrum modulation |
GB2466521A (en) * | 2008-12-29 | 2010-06-30 | Wolfson Microelectronics Plc | Frequency generation using a delay locked loop |
US20100171532A1 (en) * | 2006-02-07 | 2010-07-08 | Mitsubishi Electric Corporation | Phase synchronization loop type frequency synthesizer of fractional n-type, and phase shift circuit with frequency converting function |
US7813411B1 (en) | 2005-06-30 | 2010-10-12 | Cypress Semiconductor Corporation | Spread spectrum frequency synthesizer with high order accumulation for frequency profile generation |
US7912109B1 (en) | 2005-06-30 | 2011-03-22 | Cypress Semiconductor Corporation | Spread spectrum frequency synthesizer with first order accumulation for frequency profile generation |
US7932787B1 (en) | 2005-06-30 | 2011-04-26 | Cypress Semiconductor Corporation | Phase lock loop control system and method |
US7948327B1 (en) | 2005-06-30 | 2011-05-24 | Cypress Semiconductor Corporation | Simplified phase lock loop control model system and method |
US7961059B1 (en) | 2005-06-30 | 2011-06-14 | Cypress Semiconductor Corporation | Phase lock loop control system and method with non-consecutive feedback divide values |
US8072277B1 (en) | 2005-06-30 | 2011-12-06 | Cypress Semiconductor Corporation | Spread spectrum frequency synthesizer |
US8174326B1 (en) | 2005-06-30 | 2012-05-08 | Cypress Semiconductor Corporation | Phase lock loop control error selection system and method |
EP2396887A4 (en) * | 2009-02-13 | 2012-08-29 | Freescale Semiconductor Inc | Integrated circuit comprising frequency generation circuitry for controlling a frequency source |
CN108156401A (en) * | 2017-12-19 | 2018-06-12 | 重庆湃芯微电子有限公司 | For the low-power consumption compact digital decimation filter of cmos image sensor |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4965531A (en) * | 1989-11-22 | 1990-10-23 | Carleton University | Frequency synthesizers having dividing ratio controlled by sigma-delta modulator |
US5781044A (en) | 1994-05-12 | 1998-07-14 | Northern Telecom Limited | Delta-sigma fractional-N frequency synthesizer and frequency discriminator suitable for use therein |
US6236703B1 (en) | 1998-03-31 | 2001-05-22 | Philsar Semiconductor Inc. | Fractional-N divider using a delta-sigma modulator |
US6456164B1 (en) | 2001-03-05 | 2002-09-24 | Koninklijke Philips Electronics N.V. | Sigma delta fractional-N frequency divider with improved noise and spur performance |
US6509800B2 (en) | 2001-04-03 | 2003-01-21 | Agilent Technologies, Inc. | Polyphase noise-shaping fractional-N frequency synthesizer |
US6563390B1 (en) | 2000-12-29 | 2003-05-13 | Cypress Semiconductor Corp. | Digitally compensated voltage controlled oscillator |
US20040022340A1 (en) * | 2002-07-31 | 2004-02-05 | Advanced Micro Devices, Inc. | Accumulator controlled prescaler in a phased locked loop |
US6707855B2 (en) | 2002-06-20 | 2004-03-16 | Nokia Corporation | Digital delta sigma modulator in a fractional-N frequency synthesizer |
-
2004
- 2004-09-22 US US10/947,519 patent/US7126436B1/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4965531A (en) * | 1989-11-22 | 1990-10-23 | Carleton University | Frequency synthesizers having dividing ratio controlled by sigma-delta modulator |
US5781044A (en) | 1994-05-12 | 1998-07-14 | Northern Telecom Limited | Delta-sigma fractional-N frequency synthesizer and frequency discriminator suitable for use therein |
US6236703B1 (en) | 1998-03-31 | 2001-05-22 | Philsar Semiconductor Inc. | Fractional-N divider using a delta-sigma modulator |
US6563390B1 (en) | 2000-12-29 | 2003-05-13 | Cypress Semiconductor Corp. | Digitally compensated voltage controlled oscillator |
US6456164B1 (en) | 2001-03-05 | 2002-09-24 | Koninklijke Philips Electronics N.V. | Sigma delta fractional-N frequency divider with improved noise and spur performance |
US6509800B2 (en) | 2001-04-03 | 2003-01-21 | Agilent Technologies, Inc. | Polyphase noise-shaping fractional-N frequency synthesizer |
US6707855B2 (en) | 2002-06-20 | 2004-03-16 | Nokia Corporation | Digital delta sigma modulator in a fractional-N frequency synthesizer |
US20040022340A1 (en) * | 2002-07-31 | 2004-02-05 | Advanced Micro Devices, Inc. | Accumulator controlled prescaler in a phased locked loop |
Non-Patent Citations (6)
Title |
---|
Ahola et al., "A 2 GHz DeltaSigma Fractional-N Frequency Synthesizer in 0.35mum CMOS," EP Solid-State Circuits Conference, 2000, 4 pages. |
De Muer et al., "1.8 GHz CMOS DeltaSigma Fractional-N Synthesizer," EP Solid-State Circuits Conference, 2001, 4 pages. |
Heuberger et al., "Integrated RF transmitter based on SAW Oscillator," EP Solid-State Circuits Conference, 1997, 4 pages. |
Lin et al., "A 900-MHz 2.5-mA CMOS Frequency Synthesizer with an Automatic SC Tuning Loop," IEEE Journal of Solid-State Circuits, vol. 36, No. 3, Mar. 2001, pp. 424-431. |
Schmitt et al., "Designing an EMC-compliant UHF oscillator," RF Design, Oct. 2000, 8 pages. |
Texas Instruments, Technical Brief SWRA029, "Fractional/Integer-N PLL Basics," Aug. 1999, pp. 1-54. |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7932787B1 (en) | 2005-06-30 | 2011-04-26 | Cypress Semiconductor Corporation | Phase lock loop control system and method |
US7948327B1 (en) | 2005-06-30 | 2011-05-24 | Cypress Semiconductor Corporation | Simplified phase lock loop control model system and method |
US7813411B1 (en) | 2005-06-30 | 2010-10-12 | Cypress Semiconductor Corporation | Spread spectrum frequency synthesizer with high order accumulation for frequency profile generation |
US7912109B1 (en) | 2005-06-30 | 2011-03-22 | Cypress Semiconductor Corporation | Spread spectrum frequency synthesizer with first order accumulation for frequency profile generation |
US7701297B1 (en) | 2005-06-30 | 2010-04-20 | Cypress Semiconductor Corporation | Spread spectrum frequency synthesizer with improved frequency shape by adjusting the length of a standard curve used for spread spectrum modulation |
US7741918B1 (en) | 2005-06-30 | 2010-06-22 | Cypress Semiconductor Corporation | System and method for an enhanced noise shaping for spread spectrum modulation |
US8174326B1 (en) | 2005-06-30 | 2012-05-08 | Cypress Semiconductor Corporation | Phase lock loop control error selection system and method |
US20070001776A1 (en) * | 2005-06-30 | 2007-01-04 | Shuliang Li | Frequency modulator, circuit, and method that uses multiple vector accumulation to achieve fractional-N frequency synthesis |
US8072277B1 (en) | 2005-06-30 | 2011-12-06 | Cypress Semiconductor Corporation | Spread spectrum frequency synthesizer |
US7405629B2 (en) * | 2005-06-30 | 2008-07-29 | Cypress Semiconductor Corp. | Frequency modulator, circuit, and method that uses multiple vector accumulation to achieve fractional-N frequency synthesis |
US7961059B1 (en) | 2005-06-30 | 2011-06-14 | Cypress Semiconductor Corporation | Phase lock loop control system and method with non-consecutive feedback divide values |
US8004324B2 (en) * | 2006-02-07 | 2011-08-23 | Mitsubishi Electric Corporation | Phase-locked loop frequency synthesizer of fractional N-type, and phase shift circuit with frequency converting function |
US20100171532A1 (en) * | 2006-02-07 | 2010-07-08 | Mitsubishi Electric Corporation | Phase synchronization loop type frequency synthesizer of fractional n-type, and phase shift circuit with frequency converting function |
US7671645B2 (en) * | 2007-11-14 | 2010-03-02 | Via Technologies, Inc. | Chipsets and clock generation methods thereof |
US20090121758A1 (en) * | 2007-11-14 | 2009-05-14 | Via Technologies, Inc. | Chipsets and clock generation methods thereof |
GB2466521B (en) * | 2008-12-29 | 2013-08-07 | Wolfson Microelectronics Plc | Frequency generation |
GB2466521A (en) * | 2008-12-29 | 2010-06-30 | Wolfson Microelectronics Plc | Frequency generation using a delay locked loop |
EP2396887A4 (en) * | 2009-02-13 | 2012-08-29 | Freescale Semiconductor Inc | Integrated circuit comprising frequency generation circuitry for controlling a frequency source |
CN108156401B (en) * | 2017-12-19 | 2020-07-28 | 重庆湃芯创智微电子有限公司 | Low power consumption compact digital decimation filter for CMOS image sensor |
CN108156401A (en) * | 2017-12-19 | 2018-06-12 | 重庆湃芯微电子有限公司 | For the low-power consumption compact digital decimation filter of cmos image sensor |
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